Hyaluronic acid is a sugar, naturally produced by our body with the aim of hydrating and preserving the elasticity of the tissues. It is commonly used as a filler to volumize and rejuvenate the face and body. I usually give the injection with a microcannula, to minimize the patient's discomfort and prevent the appearance of annoying bruises as well as for greater patient safety. Undereye filler is one of my "must have" treatments. It must be performed by an experienced practitioner in order to avoid any dangerous area.